<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/Welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 为 ECharts 准备一个具备大小（宽高）的 DOM -->
      <div id="reportscharts" style="width: 800px; height: 400px"></div>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //需要合并的数据
      option: {
        color: [
          "#c23531",
          "#2f4554",
          "#61a0a8",
          "#d48265",
          "#91c7ae",
          "#749f83",
          "#ca8622",
          "#bda29a",
          "#6e7074",
          "#546570",
          "#c4ccd3",
        ],
        title: {
          text: "用户来源",
        },
        tooltip: {
          trigger: "axis",
          axisPointer: {
            type: "cross",
            label: {
              backgroundColor: "#E9EEF3",
            },
          },
        },
        grid: {
          left: "3%",
          right: "4%",
          bottom: "3%",
          containLabel: true,
        },
        xAxis: [
          {
            boundaryGap: false,
          },
        ],
        yAxis: [
          {
            type: "value",
          },
        ],
      },
    };
  },
  created() {},

  // 此时页面上的元素已经渲染完毕
  mounted() {
    this.setReportsCharts();
  },

  methods: {
    // 创建数据报表
    async setReportsCharts() {
      // 基于准备好的dom，初始化echarts实例
      var myChart = this.$echarts.init(
        document.getElementById("reportscharts")
      );

      const { data: res } = await this.$http.get("reports/type/1");
      if (res.meta.status !== 200) {
        return this.$message.error("获取折线图数据失败！");
      }
      // 指定图表的配置项和数据
      const result = this._.merge(res.data, this.option);

      // 使用刚指定的配置项和数据显示图表。
      myChart.setOption(result);
    },
  },
};
</script>

<style scoped>
</style>